CVE-2024-50296

Summary

CVE-2024-50296 is a kernel vulnerability affecting the Linux operating system, specifically in the net: hns3 driver. This issue arises when the driver is uninstalled concurrently with disabling Virtual Functions (VFs). The vulnerability occurs due to a null pointer dereference, resulting from calling the function pci_disable_sriov() twice, with the second call occurring before the corresponding resources have been released during the first call. The consequence is a kernel crash. To mitigate this issue, the patch adds a device_lock() to protect the num_VFs variable during driver removal.

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